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Frederic Weisbecker 25e2d8c1b9 sched/cputime: Fix ksoftirqd cputime accounting regression ... irq_time_read() returns the irqtime minus the ksoftirqd time. This is necessary because irq_time_read() is used to substract the IRQ time from the sum_exec_runtime of a task. If we were to include the softirq time of ksoftirqd, this task would substract its own CPU time everytime it updates ksoftirqd->sum_exec_runtime which would therefore never progress. But this behaviour got broken by: a499a5a14d ("sched/cputime: Increment kcpustat directly on irqtime account") ... which now includes ksoftirqd softirq time in the time returned by irq_time_read(). This has resulted in wrong ksoftirqd cputime reported to userspace through /proc/stat and thus "top" not showing ksoftirqd when it should after intense networking load. ksoftirqd->stime happens to be correct but it gets scaled down by sum_exec_runtime through task_cputime_adjusted(). To fix this, just account the strict IRQ time in a separate counter and use it to report the IRQ time. Reported-and-tested-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Reviewed-by: Rik van Riel <riel@redhat.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stanislaw Gruszka <sgruszka@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wanpeng Li <wanpeng.li@hotmail.com> Link: http://lkml.kernel.org/r/1493129448-5356-1-git-send-email-fweisbec@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>		8 years ago
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bpf	bpf: fix checking xdp_adjust_head on tail calls	8 years ago
cgroup	Merge branch 'for-4.11-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	8 years ago
configs	config: android-base: enable hardened usercopy and kernel ASLR	8 years ago
debug	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>	8 years ago
events	Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	8 years ago
gcov	…
irq	genirq/affinity: Fix calculating vectors to assign	8 years ago
livepatch	livepatch/module: make TAINT_LIVEPATCH module-specific	9 years ago
locking	sparc64: Use LOCKDEP_SMALL, not PROVE_LOCKING_SMALL	8 years ago
power	Merge branch 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	8 years ago
printk	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>	8 years ago
rcu	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>	8 years ago
sched	sched/cputime: Fix ksoftirqd cputime accounting regression	8 years ago
time	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	8 years ago
trace	ring-buffer: Have ring_buffer_iter_empty() return true when empty	8 years ago
.gitignore	…
Kconfig.freezer	…
Kconfig.hz	…
Kconfig.locks	locking/mutex: Allow MUTEX_SPIN_ON_OWNER when DEBUG_MUTEXES	8 years ago
Kconfig.preempt	…
Makefile	cgroup: move cgroup files under kernel/cgroup/	8 years ago
acct.c	sched/headers: Prepare to move cputime functionality from <linux/sched.h> into <linux/sched/cputime.h>	8 years ago
async.c	…
audit.c	audit: make sure we don't let the retry queue grow without bounds	8 years ago
audit.h	audit: move audit_signal_info() into kernel/auditsc.c	8 years ago
audit_fsnotify.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	8 years ago
audit_tree.c	Merge branch 'stable-4.10' of git://git.infradead.org/users/pcmoore/audit	8 years ago
audit_watch.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	8 years ago
auditfilter.c	audit: add support for session ID user filter	8 years ago
auditsc.c	audit: move audit_signal_info() into kernel/auditsc.c	8 years ago
backtracetest.c	…
bounds.c	…
capability.c	capability: export has_capability	8 years ago
compat.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	8 years ago
configs.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	8 years ago
context_tracking.c	…
cpu.c	cpu/hotplug: Serialize callback invocations proper	8 years ago
cpu_pm.c	…
crash_dump.c	…
cred.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/coredump.h>	8 years ago
delayacct.c	sched/headers: Prepare to move cputime functionality from <linux/sched.h> into <linux/sched/cputime.h>	8 years ago
dma.c	…
elfcore.c	…
exec_domain.c	…
exit.c	userfaultfd: non-cooperative: rollback userfaultfd_exit	8 years ago
extable.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	8 years ago
fork.c	sched/headers, RCU: Move rcu_copy_process() from <linux/sched/task.h> to kernel/fork.c	8 years ago
freezer.c	…
futex.c	futex: Add missing error handling to FUTEX_REQUEUE_PI	8 years ago
futex_compat.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	8 years ago
groups.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	8 years ago
hung_task.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>	8 years ago
irq_work.c	…
jump_label.c	This release has no new tracing features, just clean ups, minor fixes	8 years ago
kallsyms.c	bpf: make jited programs visible in traces	8 years ago
kcmp.c	…
kcov.c	kcov: make kcov work properly with KASLR enabled	8 years ago
kexec.c	…
kexec_core.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk	8 years ago
kexec_file.c	kexec, x86/purgatory: Unbreak it and clean it up	8 years ago
kexec_internal.h	kexec, x86/purgatory: Unbreak it and clean it up	8 years ago
kmod.c	sched/headers, vfs/execve: Prepare to move the do_execve*() prototypes from <linux/sched.h> to <linux/binfmts.h>	8 years ago
kprobes.c	powerpc updates for 4.11 part 1.	8 years ago
ksysfs.c	kernel/ksysfs.c: add __ro_after_init to bin_attribute structure	8 years ago
kthread.c	cgroup, kthread: close race window where new kthreads can be migrated to non-root cgroups	8 years ago
latencytop.c	sched/headers: Prepare to move sched_info_on() and force_schedstat_enabled() from <linux/sched.h> to <linux/sched/stat.h>	8 years ago
membarrier.c	Fix: Disable sys_membarrier when nohz_full is enabled	8 years ago
memremap.c	mm: add private lock to serialize memory hotplug operations	8 years ago
module-internal.h	…
module.c	Modules updates for v4.11	8 years ago
module_signing.c	…
notifier.c	kernel/notifier.c: simplify expression	8 years ago
nsproxy.c	…
padata.c	padata: avoid race in reordering	8 years ago
panic.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>	8 years ago
params.c	…
pid.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task.h>	8 years ago
pid_namespace.c	sched/headers: Prepare for the reduction of <linux/sched.h>'s signal API dependency	8 years ago
profile.c	sched/headers: Prepare to move sched_info_on() and force_schedstat_enabled() from <linux/sched.h> to <linux/sched/stat.h>	8 years ago
ptrace.c	ptrace: fix PTRACE_LISTEN race corrupting task->state	8 years ago
range.c	…
reboot.c	…
relay.c	lib/vsprintf.c: remove %Z support	8 years ago
resource.c	…
seccomp.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>	8 years ago
signal.c	sched/headers: Prepare to move cputime functionality from <linux/sched.h> into <linux/sched/cputime.h>	8 years ago
smp.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/idle.h>	8 years ago
smpboot.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task.h>	8 years ago
smpboot.h	…
softirq.c	softirq: Display IRQ_POLL for irq-poll statistics	8 years ago
stacktrace.c	stacktrace, lockdep: Fix address, newline ugliness	8 years ago
stop_machine.c	locking/core, stop_machine: Yield the CPU during stop machine()	8 years ago
sys.c	sched/headers: Prepare to move cputime functionality from <linux/sched.h> into <linux/sched/cputime.h>	8 years ago
sys_ni.c	move aio compat to fs/aio.c	8 years ago
sysctl.c	sysctl: report EINVAL if value is larger than UINT_MAX for proc_douintvec	8 years ago
sysctl_binary.c	sysctl: add KERN_CONT to deprecated_sysctl_warning()	8 years ago
task_work.c	…
taskstats.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	8 years ago
test_kprobes.c	…
torture.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>	8 years ago
tracepoint.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task.h>	8 years ago
tsacct.c	sched/headers: Prepare to move cputime functionality from <linux/sched.h> into <linux/sched/cputime.h>	8 years ago
ucount.c	ucount: Remove the atomicity from ucount->count	8 years ago
uid16.c	sched/headers: Prepare to remove <linux/cred.h> inclusion from <linux/sched.h>	8 years ago
up.c	smp: Add function to execute a function synchronously on a CPU	9 years ago
user-return-notifier.c	…
user.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/user.h>	8 years ago
user_namespace.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>	8 years ago
utsname.c	sched/headers: Prepare to move the task_lock()/unlock() APIs to <linux/sched/task.h>	8 years ago
utsname_sysctl.c	sched/headers: Remove <linux/rwsem.h> from <linux/sched.h>	8 years ago
watchdog.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>	8 years ago
watchdog_hld.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>	8 years ago
workqueue.c	workqueue: trigger WARN if queue_delayed_work() is called with NULL @wq	8 years ago
workqueue_internal.h	…